The gateway IP on the Ruida controller is strange. I’m curious what the subnet mask is seeing as the MAC is on a 192.168.0.0 network and the laser pinged with 192.167. Then seeing as that gateway IP.
The Ruida controllers are Auto MDI and just about any new Ethernet controller is as well, so a cross over cable prob won’t make any difference.
If your MacBook is on your home network via WiFi (for internet access), and you’re using the Wired Ethernet to connect to the laser, your computer has two ip addresses.
The IP address of the Ethernet adapter is what matters here. Moreover, the configuration of the Ethernet adapter on the Mac book is where you need to start.
Let me suggest you configure the Ethernet adapter on the Mac Book to use a static IP address On the same network as your WiFi.
And set the laser on a static up on the same network as your WiFi. Use the same gateways as your WiFi.
I think the ping worked because your MacBook was bridging the connection.